I don't get this issue though, how does the coach making a random statement equate to tampering? Yet N.E. can break major rules and get a slap on the wrist? Yes Detroit needs to be punished, that much is clear

The article just says that KC is filing a grievance, not that the NFL has ruled on anything yet without any mention of the draft picks. Did I miss where it indicated that they were guilty of anything or that a punishment had been handed down?

If they wanted to penalize the Lions a fifth or seventh round pick, they should have done it where the Lions typically pick such players: any pick in the first three rounds that isn't in the top five of the first.